Nancy, Bess, Agent Park and Temperance have to join forces when an attempt to trap a killer ends up unintentionally unleashing a deadly supernatural entity that feeds on people's sorrows. Meanwhile, Ace and Ryan discover a haunting at the Historical Society, and George meets a friend from Nick's past who may have secrets of her own. 

A truth-inducing ritual takes hold of a town-wide cocktail party, yielding volcanic emotional confessions and a surprising romantic connection for Nancy. Meanwhile, one of Ryan's business contacts comes to town with an offer that may be connected to a recent wrongful death.